did you ever experience this kind of relaxation and proudness?

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I was wondering that have you ever or how often do you experience a kind of relaxation, satisfaction and eager after a hard work. For example me when I had my exam, I decided not to enjoy at all(internet, movies, parties, everything you often have fun and entertainment) and after the final day of exam i felt so relaxed, satisfied for my sacrifice. I mean its really a proud feeling. So have you too felt this feeling? and when was it?